[Cronet] Move NetworkChangeNotifier initialization off UI thread

components/cronet/android/cronet_url_request_context_adapter.cc

Index: components/cronet/android/cronet_url_request_context_adapter.cc
diff --git a/components/cronet/android/cronet_url_request_context_adapter.cc b/components/cronet/android/cronet_url_request_context_adapter.cc
index 2a607bfb6c38a7a082717880a71e1dfbd558e0a9..00bde418792c5e11c4aa7d3bff18a98a54883cfe 100644
--- a/components/cronet/android/cronet_url_request_context_adapter.cc
+++ b/components/cronet/android/cronet_url_request_context_adapter.cc
@@ -37,6 +37,7 @@
 #include "base/values.h"
 #include "components/cronet/android/cert/cert_verifier_cache_serializer.h"
 #include "components/cronet/android/cert/proto/cert_verification.pb.h"
+#include "components/cronet/android/network_change_notifier_initer.h"
 #include "components/cronet/histogram_manager.h"
 #include "components/cronet/url_request_context_config.h"
 #include "components/prefs/pref_change_registrar.h"
@@ -610,6 +611,8 @@ void CronetURLRequestContextAdapter::InitializeOnNetworkThread(
   DCHECK(!is_context_initialized_);
   DCHECK(proxy_config_service_);
 
+  NetworkChangeNotifierInit();
+
   // TODO(mmenke):  Add method to have the builder enable SPDY.
   net::URLRequestContextBuilder context_builder;